// A Payments stand-in that records what checkout asked for. Set `failNext` to make the next// createIntent throw, as when the provider times out, and add an intent to `uncancellable` to// play one that was paid at the last moment.import type { Charge, Intent, Payments } from "../../src/payments.ts";export class FakePayments implements Payments {  readonly charges: Charge[] = [];  readonly cancelled: string[] = [];  readonly uncancellable = new Set<string>(); // intents that already succeeded at Stripe  failNext = false;  async createIntent(c: Charge): Promise<Intent> {    if (this.failNext) {      this.failNext = false;      throw new Error("connect ETIMEDOUT");    }    this.charges.push(c);    return { id: `pi_${c.order_id}`, client_secret: `pi_${c.order_id}_secret` };  }  async cancelIntent(intentId: string): Promise<boolean> {    if (this.uncancellable.has(intentId)) return false;    this.cancelled.push(intentId);    return true;  }}